Graham Buck's wife, Karen, said her life had been "turned upside down" by her husband's death.
Shortly before his murder, Mr Buck had returned for a long weekend in Poland, where he met his baby granddaughter for the first time.
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Rob Lowe said he was "devastated" by his close friend's death.
The company is relaunching the beloved classic alongside new lines.
Once named as Britain's tallest man, the 7'7" star played Mag The Mighty in the fantasy series. He died following heart failure.